21v バッテリー
Worth a lookShows a thin review moat (39 avg reviews), but pricing outside the sweet spot ($3288.25 avg) keeps it on the watch list.
Review moat
Incredible38.8avg incumbent reviews — the moat a new listing must climb
Market size
Incredible¥4.1M¥4.1M/yr · 56K searches
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Returns
Great1.9%return rate — above 5% kills the launch gate
Competition
Good53%top-5 click share — leaders hold, buyers still browse
Growth
Okay+4.7%90-day search growth — must beat 0% to launch
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Conversion
Okay2.2%search→purchase rate — share of searches ending in a sale
Avg price
Bad¥3288.25avg listing price — sweet spot $15–$100
Price range
Bad¥1753.19–¥5500.13cheapest to priciest tracked listing — scored on the share inside $15–$100